Can you use an ipod/mp3 player? Load it up with all sorts so you have a selection ready at hand? That way you won't really have picked the 'wrong' thing as you'll have it all ready to go depending on how you feel at the time.

FWIW I knew what I wanted to listen to, it stopped about 10 mins short of her actual birth, but I was too worried to ask DH to go press play in case she came out and he wasn't there ha ha But I kept thinking between pushes how spewing I was the tracks had finished lol Love listening to the CD now too.